app/views/admin/user_datas/addresses/edit.html.erb
<h2> Edit <%= customer.name.possessive %> Address </h2>
<%= form_for @form_address, url: admin_user_datas_user_address_path(customer,@form_address) do |f| %>
<%= render partial: 'form', locals: { f: f } %>
<div class="actions"><%= f.submit 'Update' , class: 'button' %></div>
<% end %>
<p>
<%= link_to "Show", admin_user_datas_user_address_path(customer, @form_address), class: 'button' %> |
<%= link_to "View All", admin_user_datas_user_addresses_path(customer), class: 'button' %>
</p>